A short comparison between m_T2 and m_CT

Details A short comparison between m_T2 and m_CT A short comparison between m_T2 and m_CT

2008-04-21

arxiv.org/abs/0804.3344v2

JHEP0806:004,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages 2 figures, JHEP Style, minor clarifications and corrected typos

Scientific paper

10.1088/1126-6708/2008/06/004

We compare m_T2 with m_CT; both are kinematic variables designed to find relationships between masses of pair-produced new states with symmetric decay chains. We find that for massless visible particles m_CT equals m_T2 in a particular limit. We identify advantages and disadvantages to the use of each variable. Tovey's paper on m_CT also introduced a powerful concept of extracting mass information from an analysis at intermediate stages of a symmetric decay chain. We suggest that m_T2 is a better tool for performing this analysis than m_CT due to m_T2's better properties under initial state radiation.

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